CAJ | 학술논문

针对栅格翼这种复杂的构造形式，采取有效的多块结构网格生成策略，对栅格翼导弹生成高质量贴体的结构网格。在此基础上，通过求解 N-S 方程，对栅格翼导弹亚、跨、超声速绕流流场进行了数值模拟。计算结果与风洞试验结果吻合较好，能够准确地捕捉到栅格框内复杂流场的流动特性，从而结构网格生成策略与计算方法得到验证，为栅格翼导弹绕流流场的精确数值模拟提供了技术途径。
침대책격익저충복잡적구조형식，채취유효적다괴결구망격생성책략，대책격익도탄생성고질량첩체적결구망격。재차기출상，통과구해 N-S 방정，대책격익도탄아、과、초성속요류류장진행료수치모의。계산결과여풍동시험결과문합교호，능구준학지포착도책격광내복잡류장적류동특성，종이결구망격생성책략여계산방법득도험증，위책격익도탄요류류장적정학수치모의제공료기술도경。
Grid fin,also known as lattice control,is a kind of unconventional aerodynamic lifting and control surfaces that consists of an outer frame supporting an inner grid of intersecting planar surfaces with small chord.In this paper an efficient meshing strategy is developed to generate high quality point-to-point multi-block structured grid for such a complex geometry.The N-S equations are solved numerically using the finite volume method on the herein generated multi-block structured grid,adopting multi-grid method to ac-celerate the convergence.With these strategies the flow around a grid-finned missile is simulated at subson-ic,transonic and supersonic states,with free stream Mach number ranging from 0.5 to 3.The simulation results show excellent agreement with the experiment data for the aerodynamic forces and moments.Detailed flow field is also obtained that exhibits the complex flow properties inside the grid frame.The results provide an effective means for accurate simulation of grid fin missiles flow fields.